Great for day or night. This super premium zoom eyepiece has a focal length of 8mm to 24mm. It is the finest zoom eyepiece for low to medium power observing. It?s an excellent zoom eye-piece that performs superbly, with fully multicoated surfaces. I... [more]

Zoom eyepieces have been embraced by spotting scope users for their quick power change convenience. In our astronomical observing, we've found the ability to fine tune the exit pupil to obtain the best overall object contrast an overlooked advantage... [more]

One of the best planetary eyepieces available anywhere 3mm-6mm Nagler ZOOM!         This high performance, high- contrast, high power eye-piece is ready to take its place among the best plan-etary eyepieces avai... [more]

  2mm ? 4mm Nagler™ Zoom With click-stops at 2, 2.5, 3, 3.5 & 4mm, this is the ultimate tool for tweaking out the last bit of power that the atmosphere will permit.   The 2-4mm Nagler™ Zoom is recommended for fast, h... [more]